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Forum: Pentax DSLR Discussion 06-20-2018, 06:01 PM  
The Six-Megapixel Club
Posted By Paul Charlier
Replies: 717
Views: 48,861
I gave my old *istDL to my daughter a couple of years ago and only yesterday asked for it back again as it has hardly been used. She just uses her phone now. So will be getting it back and having a play with it. I took some great shots on it, some I even enlarged and still have on the wall like the one attached. Good call paulh.
Forum: Pentax Film SLR Discussion 10-04-2017, 12:05 PM  
master Pentax technician interview (no, the other one)
Posted By taksharp
Replies: 15
Views: 1,716
I had a chat with Robin Gowing of Harrow Technical the other day. He's like an English Eric Hendrickson, and had some interesting things to say about the business (which is up). He also sent me pictures of his work space, complete with an MX being reborn. I wrote it up on partialsight.com. Yes, this is shameless self promotion, but it's totally relevant, so that makes it OK.
Forum: Digital Processing, Software, and Printing 10-03-2017, 11:29 AM  
This may interest some: Easy Panel Download For Photoshop
Posted By SKYGZR
Replies: 3
Views: 995
Easy Panel Download For Photoshop

watch the short video to get a feel



Free Luminosity Mask Actions DownloadTSL – Post-Processing & HDR Blog
Forum: Pentax K-1 09-24-2017, 11:03 AM  
Pentax K-1 and birds of prey in flight
Posted By beholder3
Replies: 12
Views: 1,576
I don't speak spanish, but I can watch pretty pictures :D :

Pentax K1 AF enfoque de aves al vuelo - Pentaxeros.com

Kudos to the photographer. This is not about technology. Nice subjects. Nice light. Nice framing.
Forum: General Photography 09-24-2017, 09:32 AM  
How to Identify that Light in the Sky
Posted By 17dew
Replies: 3
Views: 722
Saw this on the astronomy picture of the day site.Kinda cute. ::lol: APOD: 2017 September 24 - How to Identify that Light in the Sky
Forum: Post Your Photos! 09-10-2017, 05:00 AM  
Macro More B Grade Photo's
Posted By old4570
Replies: 2
Views: 635








Now I am not sure what is happening in this next photo , but the bee seemed to be shacking ... Like it was trying to shake something off .. :eek:

Forum: Post-Processing Articles 08-09-2017, 01:03 PM  
Get "that CCD look" with the K-3 / K-3II and Lightroom
Posted By BigMackCam
Replies: 101
Views: 9,651
UPDATE: The following article has been revised to reflect newly-optimised Lightroom settings and example images. For a limited time, you can also download the CCD Effect preset for Lightroom HERE.


Get "that CCD look" with the K-3 / K-3II and Lightroom

Many people feel that the colour rendition from Pentax's earlier CCD sensor cameras is superior to that of later CMOS sensor models. Although the K-3 and K-3II are my day-to-day cameras, more recently I've been shooting extensively with a GX-10 - Samsung's clone of the Pentax K10D - and I've become a huge fan. Whether it's down to the sensor, the camera's colour profiling or a combination of the two, I really can't say for sure; but, the results are very appealing - punchy, saturated, almost film-like images, with very little post-processing needed to achieve great-looking results.

So fond am I of the GX-10's output that I decided to develop a Lightroom preset that would re-create "that CCD look" for my K-3 and K-3II photos.

I started by taking two photographs of an X-rite ColorChecker Passport, one with the GX-10, the other with the K-3. Both cameras were fitted with the same model of lens (the Pentax-F 28-80 f/3.5-4.5), to avoid optical differences in contrast and colour reproduction. The photos were taken in RAW format using the DNG file type (which, importantly, embeds a copy of the camera profile).

I imported both photos into Lightroom 6 and ensured all settings were at Lightroom's default values, with no presets or user defaults applied. I then selected the "Embedded" profile for each photo (to use the camera profiles rather than Adobe's), and set the white balance for both images using the eye-dropper tool on the same mid-grey square of the Passport.

From this point, all adjustments would be to the K-3 image alone, trying to match against the GX-10 "master" image as closely as possible.

I fine-tuned the exposure level so that the mid-grey tones were at the same luminosity for both photos (within +/- 0.5, as there was some variance of values across the square).

I adjusted the contrast so that the "darkest black" and "brightest white" squares had the same luminosity. This required some minor tweaking of exposure to keep the mid-tones at the right level, as contrast adjustments appeared to have a non-linear effect on the tone curve. Now, each of the grey-scale squares showed luminosity values very close to those in the GX-10 image.

The remaining adjustments would deal with colour reproduction - specifically hue, saturation and luminosity for each colour.

In the Camera Calibration section of Lightroom, I adjusted the hue and saturation of the Red Primary, Green Primary and Blue Primary channels to get those primary colours as close as possible. Since there is no luminosity adjustment for these, it's impossible to get them exactly right - but we can place them in the ball park.

At this point, a casual comparison of the colours in both images was already much closer than before.

Next came the really time-consuming part...

In the Color section of Lightroom, I adjusted (and re-adjusted!) the hue, saturation and luminosity of each colour to achieve a close match for each coloured square in turn. As you'd expect, adjustments for each colour had a knock-on effect to one or more of the others, and there was a great deal of back-and-forth fine-tuning required. Small, incremental adjustments were vital to avoid significant impact on related colours, which had to be tweaked to counteract any minor changes.

I was unable to get every coloured square matching exactly, but it was very close.

I saved the adjustments as a user preset, checking the Contrast, Color Adjustments, Process Version and Calibration boxes to ensure all the relevant settings were saved.

Then, on a sunny day with no clouds (rare in my part of the world!), I took some test shots of real scenes side-by-side with both cameras, and tried out the new preset on the K-3 files. The results were good, though not quite as good as I'd hoped - in particular, the green and yellow balance wasn't quite right, and the saturation and luminosity of light-blue skies wasn't what it should be. So, I went back to the ColorChecker Passport images and fine-tuned the adjustments before re-applying them to the test shots. After many iterations over several days, I eventually reached a point of diminishing returns; the results were so close that further tweaking would have little additional benefit and more than likely be detrimental.

Here's a "before" and "after" example of the preset being applied to an indoor test shot of some coloured pencils:


What's interesting about this example is how little difference there is in the greens, as vivid greens are something the CCD sensor cameras are revered for. From my testing in normal shooting conditions, it seems this is largely due to luminosity and saturation of yellow and orange rather than a radical difference in green tones.

It's worth studying that example image in detail. At a glance, you'd be forgiven for thinking the adjusted image is merely brighter, with a little more contrast. But if you look at each pencil individually, you'll see some quite significant changes in hue, saturation and luminosity, while the white, black and grey shades are (as they should be) nearly identical in both shots :)

Since completing this exercise, I've applied the preset to a number of K-3, K-3II, and even some K-5 images from my Lightroom library. The outcome is just what I'd hoped for... the photos have more of "that CCD look" I've come to appreciate so much. Greens and browns are warmer (great for landscape work), blues are richer, light-blue skies are somewhat deeper and better defined against clouds, yellows and oranges are brighter, while reds are a real treat - more orange than scarlet and not so over-saturated.

Of course, no preset or any amount of post-processing can re-create the fun of using a particular camera. For those who've never owned one of Pentax's CCD-sensor models (or their Samsung cousins), I highly recommend picking one up at the right price, since - at lower ISO settings - they produce wonderful images. I'll continue to use my GX-10 regularly, as it's a great bit of kit - but these adjustments provide a solid basis for reproducing at least some of that signature CCD look with the K-3 and other Pentax CMOS sensor cameras.

For those who'd like to try this out, here are some screen captures of the relevant settings (remember to save them as a preset so you can apply them all in one go!). And, if you do try it, please let me know how you get on! :)






... and, just to finish, here's one more test shot from the K-3, taken in my back garden, with the CCD preset applied (and no other adjustments, save for exposure and white balance sampled from a known grey area). It certainly has the warmth and saturation I was hoping for :D


Thanks for reading!
Forum: Pentax DSLR Discussion 08-08-2017, 08:15 PM  
K1's popping up on PF Marketplace
Posted By pathdoc
Replies: 77
Views: 4,616
Yep. Every one of those cameras does something just a little bit different. I have three Pentax DSLRs, and good reasons for keeping them all - the *istDS is unique (of the ones I have) in its ability to handle analogue TTL; the K-5 is a dynamic-range legend (and is now my full-time work camera); the K-1... well, that is what it is.

And don't get me started on the film bodies. The only ones I would happily ditch are the two standard Spotmatics because they are thoroughly redundant now but there's nowhere in my immediate vicinity I can bear to donate them to, because their metering system isn't what the vast majority even of film shooters in this day and age would be used to. I should probably put a fresh battery in each, shoot one more roll of colour film apiece to check basic function and then stick them into the Marketplace for what I can get, but I have so many other things on my plate it's just beyond me right now.
Forum: Photographic Industry and Professionals 08-03-2017, 11:41 PM  
Large Photo Murals by Pentax
Posted By Chris Hewgill
Replies: 21
Views: 2,434
Recently I produced some large mural prints for a local major tourist and service centre, all taken with Pentax K3 and Pentax K5 and mix of lenses, there was lots of work to edit the right images to suit big format sizes, with murals 7.5m x 3m (Collage), 3.6m x 2.6m (Beach) and 2.8m x 2.1m (Pandanus). I've done similar images for local cafes in perplex glass, canvass and frames, but these were done on wallpaper material and have come out pretty good on colour and image quality, considering the size. It was pretty competitive to get my images in the mix, but I'm stoked I had the right coastal photos needed for the coastal tourism focussed centre.

Here a link to my web page and social media:

Hewysurf | Surf Photographer

Hewysurf-ocean and surf photography by Chris Hewgill - Home | Facebook

Chris Hewgill (@hewysurf) ? Instagram photos and videos

Chris 'Hewy' Hewgill
Forum: General Photography 08-03-2017, 06:14 PM  
Amazon Honoring a $500 Pricing Error on a $2,200 Camera Lens
Posted By brightseal
Replies: 8
Views: 1,448
Forum: Pentax DSLR Discussion 08-01-2017, 07:05 PM  
The Six-Megapixel Club
Posted By twilhelm
Replies: 717
Views: 48,861
Playing around this morning with my *ist DL and a Yashica 28 2.8. Shot at f/4. We are beginning a bike build, soon to be a cafe racer.
What I love about the *ist DL is everything that Pentax was. Small and lightweight with great natural colors. It's a great camera to carry around all day long.

build by Tony Wilhelm, on Flickr
Forum: Photographic Technique 07-31-2017, 10:17 PM  
Tilt-shift-swing Macro bellows from OTS parts
Posted By K David
Replies: 8
Views: 1,145
So I made a tilt-shift-swing macro bellows over the weekend with commercially available over the shelf (COTS) components. The nice thing about it being COTS is that it's replaceable or upgradeable to add more movements. Because 2.5" of movements may not be enough...:rolleyes:)

Anyway, in addition to being for macros, I built it to do pictorial photography and focal-place-control portraits with simple lenses. I gave it a shot today with a plano-convex lens that creates some pretty glowy images. To control that, I threw on a microscope aperture that stops down to 1mm, which allowed me to get the lens pretty sharp, but there was too much of a breeze for any of the sharp photos not to have motion blur. Anyway, there's something about a single piece of uncoated glass that conveys some amazing color.

Here are photos of the rig and some of the pictorial photo samples I took today.






Yes, that is a lens made of step-up and step-down rings mis-fitted onto an M42 aperture and that M42 aperture is on a PK adapter. Yeah, that actually does work pretty well.


Looking through the lens (the glass is in front of the aperture) at the aperture. It would be possible to mount some lenses behind the aperture, but I digress.




I thought that the tubular bellows would vignette badly and limit movement, but the movements have to be FAR more extreme than in useful for the lenses I've tested (the single-element 100mm lens and the Pentax-D FA 100mm macro) to vignette. On APS-C, this would likely not vignette at all with most lenses.








Here you can see the image vignetting. That's at about 90% of the movement capacity on the front standard.

https://photos.smugmug.com/T-S-S-Macro-Bellows/i-KZB77gZ/0/05af8eb1/L/T-S-S%...%2816%29-L.jpg
Top view of the above shot. This is far more movement than is healthy for anythign except an advanced yogi.


Side view of the above two shots.


Super-glowy single-element lens pictorial photo, no movement, wide open.


Same shot with some tilt and swing applied.


Swung way out to the edge of the image circle with some bellows vignetting.


Stopped down a bit and shifted to maximum camera movement.


Tilted and shifted to capture the very edge of the image circle. At this magnification, the lens covers an area about the size of an LF negative.

If there's interest, I'll post a parts list. All in, this cost around $220 and the parts came from three sources -- Servo City and two eBay sellers. The bellows needed a slight mod so that the 6-32 screws could fit through it (the holes in the bellows were sized for 4-32 screws.) So after drilling the mounting holes out to 7/16 (I think), the screws fit well. The base COULD be made smaller but I over-sized the width for stability and weight to counter balance the K-1's weight. I wouldn't suggest going much narrower. Also, focus is a bit odd since the tripod mount is on the front standard, but I got used to it in a couple of re-focuses. The only technical limitation with this design is that the camera is mounted in portrait orientation. To rectify that, the bellows would need a second tripod mount where the affixing screw is right now. In my mind, portrait orientation isn't the end of the world as the means to achieve portrait orientation with this design would be exceedingly cumbersome.
Forum: Pentax K-1 08-01-2017, 01:33 AM  
Aftermarket LCD Viewfinder for K1
Posted By GUB
Replies: 6
Views: 1,138
As I use legacy MF glass exclusively, I have become totally dependant on LCD viewfinders with LV and focus peaking to handle focus. I have 3 or 4 LCD viewfinder aids lying around for my K01 and K30 but none of them fit my newly acquired K1 without at least some modification.
I have finally found a viewfinder which fits the K1 nicely.
It focuses nicely when its rubber front edge is up against the screen and its base plate is a quick attach tripod fitting with a nice long and rubbery connection with the base of the camera. This makes for a nice sturdy mount when the camera is on portrait on my ballhead and my hefty macro is mounted.
And most importantly it (only just) covers the screen.

It is a Swivi S3.

I thought I would create this thread so other people can share their findings on what good viewfinders they have found to fit.
Oh and ps - I am a farmer and not a Swivi marketer!!
Forum: Pentax DSLR Discussion 07-30-2017, 06:02 PM  
K1's popping up on PF Marketplace
Posted By D1N0
Replies: 77
Views: 4,616
it is
Forum: Pentax DSLR Discussion 07-30-2017, 04:23 PM  
K1's popping up on PF Marketplace
Posted By monochrome
Replies: 77
Views: 4,616
When your last child graduates college you get the biggest raise of your life :lol:
Forum: Pentax DSLR Discussion 07-30-2017, 04:17 PM  
K1's popping up on PF Marketplace
Posted By hjoseph7
Replies: 77
Views: 4,616
Could be they were trying to avoid a divorce...
Forum: Pentax DSLR Discussion 07-30-2017, 04:09 PM  
K1's popping up on PF Marketplace
Posted By monochrome
Replies: 77
Views: 4,616
I bought a silver KP on the Forum only weeks after it was released. The seller had been on a buying spree and decided to rationalize his collection. He also sold 2 FA Limiteds and a number of other pro lenses.

I attribute the K-1 sales to having opened the MasterCard bill and thinking, "My God. What have I done?"
Forum: Pentax DSLR Discussion 07-30-2017, 04:02 PM  
K1's popping up on PF Marketplace
Posted By Kerrowdown
Replies: 77
Views: 4,616
Now there's a phrase to conjure with... :lol::lol::lol:
Forum: Pentax DSLR Discussion 07-30-2017, 03:35 PM  
K1's popping up on PF Marketplace
Posted By Kerrowdown
Replies: 77
Views: 4,616
I think a few a while back, decided to move up a format again to MF. :)

I'm more than happy with what the K1 is capable of producing, even as he whispers... with my old "Ladies". :D
Forum: Pentax DSLR Discussion 07-30-2017, 03:51 PM  
K1's popping up on PF Marketplace
Posted By pathdoc
Replies: 77
Views: 4,616
Mine sits sadly unused a lot of the time because I am tired, overworked, the weather has been unbelievably wet and many of the lenses I bought it to use with are film-era and therefore unsealed, and because I recently rediscovered my film cameras in a very big way (having FOUR of them at once serviced by Eric Hendrickson will do that to you).

But now that I've got it, there is no way on earth I'm letting it go. Among other things, I have recently found a marvellously efficient and FAST workflow for scanning B&W negatives using it, which neither my K-5 nor my *istDS could even dream of duplicating. It's sort of amusing to watch the K-1 being transformed into nothing more than a service appendage of cameras like my S1a, but there you go. I bought it to do the things it could do better than anything I already had, and this just happens to be one of them. :lol:
Forum: Pentax Q 07-29-2017, 01:25 PM  
So, is the Q still supported?
Posted By richard0170
Replies: 120
Views: 10,238
Please just shut up. Your obvious bias and hatred is really rather boring. The Q system may not not be for you, but it is good enough, even if imperfect, for plenty of other people. We all know that it is unlikely to be improved upon from what is currently available.We are just expressing a desire for what we would like, however unlikely that may be to come to fruition.
Forum: Pentax Camera and Field Accessories 07-27-2017, 08:01 PM  
Silly Storage Ideas
Posted By goldenarrow
Replies: 10
Views: 947
While purchasing waterproof storage for my cameras and lenses at the Container Store, (SEE HERE: Weathertight Totes), I stumbled upon these very nice cylindrical food storage containers.





They are semi-hard plastic, food grade, waterproof gasket, and shaped like they could hold various sized lenses. I liked the simple round design and lack of dramatic tapering. Also appreciated is the BPA-free material which suggests no toxic out-gassing issues to damage lens coatings over long periods of time. Only 4.99 each, cheaper than most neoprene unless you buy the toxic stuff direct from China. After some quick smartphone searches for the dimensions of two popular lenses, I guessed that they might fit the 34 oz. version.

With two of them purchased and at home, I slid 16-50* lens inside with its lens shade attached backwards and it fit like a glove! On the other lens, I am using a 62-67mm step up ring with a 67mm rubber lens hood. Slid that one in the other container and, shazam, it also fit like it was made for it! I put a small silica gel pack in each one, sealed it up, and put them in my Lowe backpack for my next trip this weekend. I also figured that if the container was taller, a layer of black packing foam can be cut for the bottom and top. I do plan on putting some foam around the inside-bottom to hold the lens mounts in place to not stress what is being held snugly at the top.

What other stories out there and pics can you share for good storage ideas?? Hopefully something that can save money over traditional methods or better perfomance in some way.
:D

P.S., For the larger Watertight Totes, I have purchased these small, oven-rechargeable silica humidity control packs from WalMart:
40g Indicating Silica Gel
Forum: Pentax K-1 07-20-2017, 12:59 PM  
Pentax K-1 laughing about Canon 6DII image quality performance
Posted By CDW
Replies: 60
Views: 6,809
As one of the DPReview staff pointed out, the sensor in the 6D2 uses off-chip A/D converters, increasing noise, particularly in the shadow areas. Compared to the K1, especially for any night sky, astro, landscape shooting, the Canon is laughable. But it's a Canon and that's all that matters to novice photographers. A local photography club that I attend is mostly composed of the Nikon/Canon crowd. One member shoots with Lumix, another with SONY and I'm the only Pentax shooter. And at club presentations, I see horrible post processing skills, bumped contrast, over the top saturation, hideous HDR/tone mapping. The best images in the world won't stand those types of post processing abuse. A camera like the K1 with state of the art noise and dynamic range performance, not to mention unique features that Canikon have yet to implement in their systems, is lost on the typical Canon buyer.

As a poster on DPR noted, the reality is the 6D2 is nothing more than a FF Rebel. And extremely overpriced.
Forum: Pentax DSLR Discussion 07-17-2017, 09:56 PM  
Proper use of Astrotracer?
Posted By awscreo
Replies: 13
Views: 854
So I tried using astrotracer for the second time yesterday. I honestly thought it'd give me more than 1m exposure while keeping the stars as points, anything over had stars streaking. Is that normal?
I was using my Rokinon 14 2.8, so pretty wide. It keeps the stars as points at around 30s, so astrotracer gave me double the exposure time (which is still good I guess, with no extra equipment).
Is there a way to utilize it more effectively, or this is as much as I should expect out of it?

I took 2 exposures, one for sky with AT, and another one for foreground with AT off to have the foreground still

Bridge to Vermont at night
by Timur Dzhambinov, on Flickr

Same here

Night sky
by Timur Dzhambinov, on Flickr
Forum: Digital Processing, Software, and Printing 07-17-2017, 07:42 PM  
Converting PEF to DNG in Lightroom
Posted By seventhdr
Replies: 13
Views: 1,316
On the Adobe site you can download a stand alone RAW (PEF) to DNG converter. This should work for you. Convert the files to DNG and then import into Lightroom.

You can get it here = Adobe Digital Negative Converter 9.x

Also update Lightroom to the latest version.

Regards

Chris
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